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REMEDIATION TESTING AND DESIGN <br /> ENVIRONMENTAL INVESTIGATION REMEDIATION SITE CLOSURE <br /> 609 Pacific Avenue, Suite 201, Santa Cruz 95060, CA <br /> Phone 408-458-1612 FAX 408-458-1509 <br /> May 28, 1993 <br /> Mr. Fred Cruz <br /> San Joaquin County Air Pollution Control District <br /> 4230 Kiernan Avenue - Suite 130 <br /> Modesto, California 95356 <br /> Subject : workplan/Proposal to Conduct a Soil Gas Survey and Vacuum <br /> Extraction Feasibility Testing at Beacon Station #513 , 401 <br /> East Kettleman Lane in Lodi, California <br /> Dear Mr. Cruz : <br /> Remediation, Testing and Design (RTD) is pleased to submit the <br /> following letter regarding RTDs request to perform work at the above <br /> referenced site . Please find enclosed the Workplan (Scope of Work) <br /> to conduct a soil gas survey (SGS) and vacuum extraction feasibility <br /> testing (VEFT) at the above referenced Beacon Station in Lodi, <br /> California. The work to be performed, as outlined below, will be <br /> = - " done in less than 48 hours . <br /> We respectfully request that, if this letter is sufficient to ensure <br /> compliance with appropriate regulations and you feel satisfied with <br /> its' content, you issue a short letter/note to Mr. Harlan Knoll at <br /> San Joaquin County Public Health Services via fax at (209) 464-0138 . <br /> As we intend to initiate work on May 8 , 1993 , we fully appreciate <br /> your cooperation in expediting this request . <br /> SCOPE OF WORK <br /> RTD proposes the following activities : 1) Conduct a Soil Gas Survey, <br /> 2) Conduct Vacuum Extraction Feasibility Testing, and 3) Prepare a <br /> report outlining the procedures, data, evaluations, findings, and <br /> recommendations . Details of these activities are presented below. <br /> Soil Gas Survey <br /> In order to investigate and characterize the general extent and <br /> distribution of possible hydrocarbon impacts to shallow soils, a <br /> limited Soil Gas Survey (SGS) is proposed. The SGS will generally <br /> consist of the installation of 16 temporary vapor extraction probes . <br /> The probes will be constructed of Schedule 80 3/4-inch diameter <br /> carbon steel pipe . Each probe will contain a 36-inch range of 3/16- <br /> inch drilled perforations at one end with a forged point . All <br /> probes will be decontaminated by steam cleaning prior to arrival on <br /> 1 <br />